Yes. But also keep one's own originally downloaded version, in case the newer version is messed up And even more cool: If one could browse one's friends' sites

Yes. But also keep one's own originally downloaded version, in case the newer version is messed up And even more cool: If one could browse one's friends' sites, while everyone was offline (if their privacy / sharing settings allowed), just a local net in maybe a rural village Edit: roadmap: "Distributed p2p web browser on IPFS" -- is that it? :-)